Nepean Bay Weather Forecast

    • 6
    • 19

    Sunny

    • 9
    • 20

    Mostly sunny

    • 12
    • 21

    Showers easing

    • 8
    • 19

    Cloudy

    • 7
    • 16

    Cloudy

    • 6
    • 16

    Cloudy

    • 5
    • 19

    Sunny

Today 11 Sep Kangaroo Island

The chance of morning fog. Mostly sunny afternoon. Winds easterly 15 to 20 km/h tending northeasterly in the morning then becoming light in the early afternoon. Overnight temperatures falling to around 8 with daytime temperatures reaching around 18.

Investigator Strait Coastal Waters

Wind
Easterly 10 to 15 knots decreasing to about 10 knots in the middle of the day.
Seas
Around 1 metre.
1st Swell
West to southwesterly below 1 metre, increasing to 1 to 2 metres through the Backstairs Passage.
Weather
Mostly sunny.
Graph Plots Open in Graphs

  • Temperature Forecast Bureau of Meteorology

  • Temperature Real-Time

Nepean Bay Temperature Statistics View More

September Temperature

Kingscote Airport (7km)

  • Lowest 8 September, 2026

    1.9 °C

  • Average September

    12.3 °C

  • Highest 1 September, 2026

    21.3 °C

Climate (2021–2026)

Kingscote Airport (7km)

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  • Average Low 2021–2026

    9.3 °C

  • Average 2021–2026

    14.8 °C

  • Average High 2021–2026

    21.1 °C
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